But a source said Sunday that isn’t something that just came about. The source added that Nets general manager Sean Marks and the Sixers haven’t had discussions about a Simmons-for-Harden deal. However, the source noted both sides are going through back channels and third parties to get information. “It’s the most bizarre thing,” the source said. “It’s almost as if they are playing a game of cat and mouse … because of all the tampering [implications].”